B-band (κ_bol, o, orange) and hard X-ray (κ_{bol, 2 − 10}, blue) bolometric correction factors for our stacked optical-UV X-ray SEDs, as a function of “refined” bolometric luminosity (top panel), “refined” Eddington ratio λ_Edd^* (middle panel), and BH-mass M_BH (bottom panel). Points with a similar Eddington ratio (λ_Edd, taken from Wu & Shen 2022) are connected with lines and share the same color. The points overall straddle the literature relations from Duras et al. 2020.